Oxidized Anticoagulant Starch Adhesive Preparation
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Solution Overview
Problem
Existing oxidized starch adhesives for corrugated boxes have limitations in anti-coagulation and storage stability, with low capability to prevent coagulation and poor shelf life.
Innovation Solution
A method for preparing oxidized anticoagulant starch adhesive involves mixing original starch with deionized water, adjusting pH, and conducting oxidation and esterification reactions using specific oxidants and reductants, followed by neutralization and addition of a self-made ionic esterifying agent to enhance anticoagulant properties and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional oxidized starch adhesive is used, then basic adhesive properties are achieved, but anticoagulant capability is insufficient and storage stability is poor
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of starch through oxidation and esterification reactions. The oxidation degree and esterification degree are controlled parameters that transform ordinary starch into oxidized esterified starch, fundamentally changing its anticoagulant properties and storage stability. This chemical modification approach directly addresses the insufficient anticoagulant capability and poor storage stability of conventional starch adhesives.
Solution Approach 2:
The patent creates a composite material system by combining oxidized starch with esterifying agents (such as vinyl acetate, acrylic acid, or itaconic acid). This composite approach produces oxidized esterified starch that integrates the advantages of both components, achieving enhanced anticoagulant effect and storage stability that neither component could achieve alone.
2Strength
If oxidation reaction is performed to improve adhesive properties, then adhesion performance is enhanced, but storage period is reduced
Solution Approach 1:
The patent applies preliminary action by performing controlled oxidation followed by esterification before the adhesive is put into storage. The oxidation creates reactive groups that enhance adhesion, while the subsequent esterification stabilizes these groups, preventing further unwanted reactions during storage. This preliminary chemical treatment ensures both strong adhesion performance and extended storage period.
Solution Approach 2:
The patent uses esterification as a cushioning measure after oxidation. The esterification reaction stabilizes the oxidized starch by capping reactive aldehyde groups, preventing them from causing coagulation or degradation during storage. This beforehand cushioning protects the adhesive's performance while maintaining enhanced adhesion properties.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The resulting starch adhesive exhibits improved anticoagulant effects and extended storage stability, making it suitable for corrugated box applications with enhanced performance.
Implementation Method 1
oxidation reaction is carried out at 40-60° C.; after the oxidation reaction is completed
Implementation Method 2
a reductant is added to react with the unreacted oxidant
Implementation Method 3
an esterifying agent is added for esterification reaction; the carboxyl functional group in the structure can be esterified with a hydroxyl group in corn starch to form a hydrophobic long-chain ester-based compound
Data Source
AI summary
The present invention provides a preparation method of an oxidized anticoagulant starch adhesive, comprising the following steps: (1) an original starch and deionized water are mixed to form a starch emulsion, then the pH is adjusted to perform an oxidation reaction; a reductant is added to react with the unreacted oxidant, after the reaction is completed, an esterifying agent is added to perform an esterification reaction after adjusting pH; then a product is neutralized, washed, filtered and dried to obtain starch granules; and (2) a 40-50% starch emulsion is formulated by using the starch granules obtained in the step (1), the pH is adjusted to 6.5-7.5 after gelatinization, and dispersing agent, defoamer and water are added to form a starch adhesive. The esterifying agent used is composed of an anion and a cation, which significantly improves anticoagulant effect of the starch adhesive.